I had this as a secondary optic for my short barrel 308 AR, never zeroed it. I got a couple of these 30mm Cantilever mounts in the classifieds, they were advertised as Vortex clones and cheap, don't know, but the other has been on my 308 with a heavy Burris Four X 3-12x56mm and hasn't given me any issues. They appear to be very well constructed and the other hasn't left ring marks on either scope that has been in it.
Philippines manufactured Burris Fullfield II E1 30mm 3-9x40mm in the original box with paperwork as shown and includes mount
$150 shipped
Philippines manufactured Burris Fullfield II E1 30mm 3-9x40mm in the original box with paperwork as shown and includes mount
$150 shipped